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Zygomatic osteoma with atypical heterogeneity in a dog
K A Johnson1, A J Cooley, D L Darien
1Department of Surgical Sciences, University of Wisconsin-Madison, USA.
Journal of Comparative Pathology
|February 1, 1996
Abstract:
An osteoma of the zygomatic bone in a young dog is described. It had large, centralized radiolucent regions consisting of fatty bone marrow and sparse trabeculae. A discrete, proliferative nodule within the osteoma consisted of closely-packed woven bone trabeculae and pleomorphic osteoblasts associated with haphazard osteoid deposits, resembling osteosarcoma-like change. These heterogeneous structural features were at variance with more classic reports of osteoma, which usually describe a uniform cancellous or cortical bone architecture.